.parent { display: flex; /* or inline-flex */
flex-direction: row | row-reverse | column | column-reverse;
flex-wrap: nowrap | wrap | wrap-reverse;
justify-content: flex-start | flex-end | center | space-between | space-around | space-evenly | start | end | left | right;
align-items: stretch | flex-start | flex-end | center | baseline | first baseline | last baseline | start | end | self-start | self-end;
align-content: flex-start | flex-end | center | space-between | space-around | space-evenly | stretch | start | end | baseline | first baseline | last baseline;
/* GAP */
gap: 10px;
gap: 10px 20px; /* row-gap column gap */
row-gap: 10px;
column-gap: 20px;
} .children { order: 5; /* default is 0 */
flex-grow: 4; /* default 0 */
flex-shrink: 3; /* default 1 */
flex-basis: 33.33% | auto; /* default size auto */
/* Shorthand */
flex: none | [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ]
align-self: auto | flex-start | flex-end | center | baseline | stretch;
}